Process and machine for forming glass articles.



PATENTED JULY 3, 1906.

- P. T. SIEVERT.

PROCESS AND MACHINE FOR FORMING GLASS A RTIGLES.

APPLICATION FILED JAN. 9, 1906.

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No. 825,161. PATENTED JULY S, 1906. P. T. SIEVERT. PROCESS AND MACHINE FOR FORMING GLASS ARTICLES.

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PAUL riinonon. SIEVERT, OF DRESDEN, GERMANY.

Specification of Letters Patent.

Patented July 3, 1906.

Original application filed'lanuary 7 1905, Serial No. 240,003. Divided and this applioatlon filed new, 9, 1906. Serial No. 196,247.

To all whom it may concern: J v 1 Be it known that I, PAUL THEODOR SIEV- ERT, a citizen of the German. Empire,

resident of Dresden, Germany, have invented certain newand useful Improvements in Processes and Machines for Forming Glass Articles, of which the following is a specification.

My invention relates to a process of and apparatus for forming hollow lass articles, and particularl for forming glass cylinders or other artic es the lower end of which is to be open. f

In a com anion application, Serial No. 240,003, file January. 7, 1905, of which ap plication this is a division, I have shown a process of and methodfor blowin hollow glass That invention is well adapted to theblowing of glass cylinders from which plate or sheet glass is made and similar articles which require to be opened at their lower ends. Thepresentinvention provides a convenient way of producing this opening and of assisting in the extension of the article durin the process of forming the saine.

the drawings, Figure 1 is a vertical elevation, partly in section, of a glass-forming apparatus, embodying my invention. Fig. 2 the arts being disposedin difierent position an certainparts being, as before, m section. 'Fig. 3 is a partial vertical section showing the device in operation. Fig. 4 isa similar section showing a modified form of the device. Fig. 5 is a vertical section of a mold which may be used in connection with my invention. Fig. 6 is a top plan view, and Fig. 7 a vertical section, of a mold of somewhat modified construction.

1 designates a carrier consisting of a frame which may have any desired form and which,

' as shown, is suspended from a shaft 2, rotatably supported on a frame 3. The rotation of the shaft is effected through a Worm-gear 4, which is driven .by any suitable motor, shown as annelectric motor 5. The frame 3 is capable of vertical motion in the main frame?) of the machine and is suspended by a cable 7, which runs over a winch 8 and carries at its free end a suitable counterpoise 9.

The winch 8 may be rotated by means ofa motor 10, whereby the slide-frame 3 and the and a carrying-frame 1 are raised and-lowered as desired.

11 designates a mold into which the molten metal is poured, which mold rests upon a carriage 12, running upon rails 13. The molten metal is poured into the 'mold 11, which is then run under the machine-frame 6 and brought into vertical alinement with the frame 1. The frame is then lowered upon the mold 11, as shown in preferably having been reviously heated, hich may be convenient y accomplished by lowering it into the-heating-chamber or firedrum 18. The moltenmetal-or mass of glass Fig. 1, the framenow becomes engaged with the frame 1, so that it will remain suspended from the framev when. the latter is raised.

In the application main in the position shown in Fig. 1, in which the frame 1 rests upon the edges of the mold 11 until the molten metal 14 has cooled down, so that that portion. thereof resting u on the central portion of the mold is below The carrier 1 is then raised to the position drawings, lifting the mold-11, the cake, although stillplastic, ing sufiiciently cooled'so that it remains inan approximately level form, as shown. 0001- ing means, as a channel 15 in the mold 11 or a channel 16 in the frame 1, may be prov ded, if desired. 1

In the operation of my present process and of the apparatus herein shown it is of course unim ortant whether the artial cooling of the ass mass while it st$ remains in the mol takes place or not. If the glass is so cooled, it is necessary after the removal of the mold, which is performed by sliding the carriage 12 out of the way, to reheat it by lowering the frame 1 with the glass attached thereto into theheatin chamber 18. On the glass being again raise it begins to extend by gravity, which may, if desired, be assisted by the introduction of a fluid under pressure through thepassage 28 into the upper part of the frame 1 above the glass cake.

At any desired (point, preferably when a cylinder of consi erable length as been formed, as shown in Fig; 3 of the drawings, the plate 34, which is shown as pivotally supabove named, of which this is a division, the parts are suffered to re-- shown in Fig. 2 oftthe glass cake out of ported by a bolt 35 in one of the covers 19 of tion shown in Fig. 3 of the drawings. The

the heat risin article 14 is thenlowered, so as to rest on theplate 34, so that its lower ortion adheres This adhesion will be assisted by from the chamber 18. The plate 34 is she on eye blow with a hammer or otherwise or then suddenly cooled, as by a :jet of water or cold air, when. the bottom of the article or cylinder 14 will be cracked as, whereby the bottom of the cylinderis opened.

thereto.

T he plate 34 may then be swung to its osition shown in Fig. 1 of the drawings an the cylinderfl i reheated by lowering it into the chamber '18. The lower portion of the article 14 will then expand, torming'a substantially cylindrical sha e for its ent'ue length. It will be seen that t e upper portion of the chamber18 is provided with a recess 36 for the reception of the 'plat'e34 when not in use and that the cover 19, to whichthe late 34 is eccentrically attached, is provide with a depending flange 87 to prevent escape of heat through the recess 36.

- In the form of my device shown in Fig. 4 of the drawings the plate 34 is provided with an 11' wardly extending lug or pin 3am whic rests a loose plate 39. it is evident that the former operations being performed, the article 14 on being raised will carry with it the plate 39. This may be lowered with .the article 14 into the heating-chamber 18, so that when the article 14 is raised for further extension the weight of the plate 39 will assist in this operation. At any desired time the plate 39 may be quickly cooled or shaken, as before described, in which. case the bottom of the cylinder will be cracked off as before.

A further modification is shown in Fig. 5 of the drawings, in which the mold 1,1, in which the metal is originally poured and in which the cake is cast, is provided with a plate 39, similar to that shown in Fig. i. The plate in this case is set in a suitable recess in the bottom of the mold 11. It is evident that when the'plate is lifted from the mold by the iirstraising otthe carrier 1 this plate wi be raised therewith and will consequently act to assist in developing and extendmgthe cylinder made from the glass'cake 14 and that it can be cracked oil when desired.

glass case.

The mold shown in Figs. hand 7 of the Y drawings is particularly ada' ted to the making of a cake of glass from w ich a rectangular vessel having'two flat sides is afterward to be made. in this case a suitable recess in the bottom of the mold is occupied bya plate 39 which, as before,-adheres to the bottom of the In this case it is of course understood that the periphery of the frame or carrier l'will be in the form of a rectangle substantially like the plate 39*, so that the glass article-when extended will have two. large .fia't sides each "capable of making when properly out afsheet ofrglassj T It is evide tthat various other modifica tions may be made in the form of the devioe necessary to carry out the process of the invention without departure therefrom and that, so far as the claims to the device itself shown without departing from the same.

What Iclajim is A glass articles having open lower ends which comprises: casting the metal in a .mold, attaching to the eriphery of the cast cake or mass a suspen ed carrier frame, raising-the process. of manufacturing hollowgo, modifications may be made in the form glass mass from the mold byfmeans of the downwardly, attaching to the lower portion of the mass either before or after-its extencarrier, treating the mass to extend its walls sion a metal late, and crackingoif the lower 7 end of the g ass mass after its extension.

2. A: process of manufacturing hollow glass articleshaving open lower ends which comprises: casting the metal in a,mold, at tachrng to the periphery of the cast cake or. mass a suspen carrier, attaching tothe'lower portion of the m'ass-a' metal late, raising the glass mass and the plate so that the weightof the plate acts to extend the mass, and cracking off the ed carr er-frame,.raising the glass mass from the mold by means of the lower end of themass after its extension. 3. A process of manufacturing hollow glass articles having open lower ends which comprises: casting the metal in a mold provided with a loose plate at its lower portion,

attaching to the periphery of the cast cake or mass a suspended carrier-frame, raising the cast mass with the plate adhering thereto from the mold, moving the mass to secure the downward extension of its walls assisted by the weight of the plate, and cracking off the lower end of the mass after its extension.

4.. A machine for manufacturing hollow glass articles comprising: a mold for castin a glass mass, a suspended carrier-frame or attachment to the periphery of the mass while the mass is in the mold, means for raising the frame, means for removing the mold from beneath the frame, and a plate positioned to be attached to the lower part of the mass.

5. A machine for manufacturing hollow glass articles comprising: a mold for casting a glass mass, a suspended carrier-frame for attachment to the eriphery' .of the mass while the mass is in t e mold, means for raising the frame, means for removing the mold from beneath the frame, and a loose plate l positioned to be'attached to the lower part of the-mass.

6. A machine for manufacturing hollow glass articles comprising: a mold for casting a glass mass, a loose plate in the bottom of said mold, a. suspended carrier-frame f0! at- In testimony whereof I have signed this tachment to the peri hery of the mass while specification in the presence of two subscrib- 1o ghe mass is in %he mo d, meags for lrsiging tahe witnesses.

ame, means or removin t e mo om eneath the frame with t e plate adhering PAUL THEODOR 'SIEVERT' thereto to the bottom of the mass, and a. Witnesses: heating-chamber below and in vertical 'aline- PAUL E. SCHILLING, ment with the frame. I PAUL AREAS. 

